Electronic Shift Module
WARNING: This page is about a different car, the 2021 Jeep Grand Cherokee L. However, it is still accessible from the selected car via links, so may be relevant.
DESCRIPTION
The Electronic Shift Module (ESM) (1) is part of the rotary shifter assembly.
The rotary shifter offers Park , Reverse , Neutral and Drive modes of operation.
OPERATION
The ESM communicates with Electronic Control Units (ECUs) on the Controller Area Network - Flexible Data 3 (CAN-FD3) bus.
The ESM is connected to the vehicle wire harness with a single 10-terminal connector located on the bottom of the shifter.
The ESM can set Diagnostic Trouble Codes (DTCs) when a fault is detected.